Earthquake with magnitude of ML 1.1 on date 26-02-2021 and time 08:34:39 (Italy) in region 3 km N Preci (PG)

A magnitude ML 1.1 earthquake occured in region: 3 km N Preci (PG), on

  • 26-02-2021 07:34:39 (UTC)
  • 26-02-2021 08:34:39 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.91, 13.04 at 11 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Preci PG 3 724 724
Visso MC 5 1107 1831
Sellano PG 9 1079 2910
Ussita MC 9 444 3354
Monte Cavallo MC 10 145 3499
Castelsantangelo sul Nera MC 10 281 3780
Norcia PG 14 4957 8737
Cerreto di Spoleto PG 14 1075 9812
Fiordimonte MC 15 202 10014
Pieve Torina MC 15 1458 11472
Fiastra MC 17 559 12031
Pievebovigliana MC 18 866 12897
Acquacanina MC 18 121 13018
Bolognola MC 18 142 13160
Muccia MC 19 915 14075
Serravalle di Chienti MC 19 1070 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km E of Foligno (57155 inhabitants)
50 Km NE of Terni (111501 inhabitants)
57 Km E of Perugia (166134 inhabitants)
61 Km W of Teramo (54892 inhabitants)
69 Km NW of L'Aquila (69753 inhabitants)
88 Km SW of Ancona (100861 inhabitants)
94 Km NE of Viterbo (67173 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.1 2021-02-26
07:34:39
42.91 13.04 11 2021-02-26
07:40:52
Sala Sismica INGV-Roma 87493781
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-26 07:34:39 ± 0.06
Latitude 42.91 ± 0.00
Longitude 13.04 ± 0.00
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87493781

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 377
Semi-minor axis of confidence ellipse (meter) 356
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 336
Circular confidence region, given by single value of horizontal uncertainty (meter) 380
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 86
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.11242
Epicentral distance of station farthest from the epicenter (degree) 0.42178
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 87493781
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-26 07:40:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-02-26T07:34:54.69 0.3 undecidable manual S 7 0.4218 50 0.46 64
IV.MOMA.HHZ. 2021-02-26T07:34:52.53 0.3 undecidable manual S 253 0.357 50 0.23 69
IV.LNSS.HHZ. 2021-02-26T07:34:50.81 0.6 undecidable manual S 179 0.3067 50 -0.01 48
IV.CSP1.EHZ. 2021-02-26T07:34:48.10 0.3 undecidable manual S 34 0.2203 50 -0.15 72
IV.GAVE.EHZ. 2021-02-26T07:34:48.67 0.3 undecidable manual S 205 0.241 50 -0.19 71
IV.MMO1.EHZ. 2021-02-26T07:34:47.84 0.3 undecidable manual S 93 0.214 50 -0.23 71
IV.MOMA.HHZ. 2021-02-26T07:34:47.06 0.1 undecidable manual P 253 0.357 50 0.29 90
IV.EL6.EHZ. 2021-02-26T07:34:47.79 0.1 undecidable manual P 7 0.4218 50 -0.1 93
IV.LNSS.HHZ. 2021-02-26T07:34:45.73 0.1 undecidable manual P 179 0.3067 50 -0.19 93
IV.FDMO.HHZ. 2021-02-26T07:34:45.30 0.3 undecidable manual S 17 0.1322 127 -0.27 71
IV.MC2.EHZ. 2021-02-26T07:34:45.23 0.3 undecidable manual S 89 0.1124 131 0.24 72
IV.CESI.HHZ. 2021-02-26T07:34:45.44 0.3 undecidable manual S 315 0.1349 126 -0.21 72
IV.CSP1.EHZ. 2021-02-26T07:34:44.35 0.1 positive manual P 34 0.2203 50 -0.09 97
IV.MMO1.EHZ. 2021-02-26T07:34:44.47 0.1 undecidable manual P 93 0.214 50 0.14 96
IV.GAVE.EHZ. 2021-02-26T07:34:44.66 0.1 undecidable manual P 205 0.241 50 -0.13 95
IV.CESI.HHZ. 2021-02-26T07:34:42.94 0.1 negative manual P 315 0.1349 126 0 100
IV.FDMO.HHZ. 2021-02-26T07:34:42.87 0.1 undecidable manual P 17 0.1322 127 -0.02 100
IV.MC2.EHZ. 2021-02-26T07:34:42.80 0.1 undecidable manual P 89 0.1124 131 0.25 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:1.1 0.000116 0.2 AML other m 2021-02-26T07:34:45.53
IV.FDMO.HHE. ML:1.1 0.0001295 0.26 AML other m 2021-02-26T07:34:45.69
IV.CESI.HHE. ML:1 0.00010275 0.18 AML other m 2021-02-26T07:34:45.85
IV.CESI.HHN. ML:1 9.42E-5 1.18 AML other m 2021-02-26T07:34:46.96
IV.LNSS.HHE. ML:1 3.94E-5 0.54 AML other m 2021-02-26T07:34:51.24
IV.LNSS.HHN. ML:1.1 4.8E-5 0.2 AML other m 2021-02-26T07:34:51.68
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download